body{padding:0;margin:0;}
.btn{width:100px;height:100px;background: #c3c3c3;line-height: 100px;text-align: center;margin:200px auto;}
.popup{width:800px;height:500px;border:1px solid silver;background:goldenrod;position:absolute;top:100px;left: 250px;}
.remove{width:30px;height:30px;background: #808080;position:absolute;top: 10px;right:10px;color:#fff;line-height: 30px;text-align: center;font-size: 30px;cursor: pointer;}